Finding the Fourth Proportional to 1,055.40, 1,456.49 and 607.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.40 : 1,456.49 = 607.34 : x
2. Step 2: Convert to fraction form
   1,055.40/1,456.49 = 607.34/x
3. Step 3: Cross multiply
   1,055.40x = 1,456.49 × 607.34
4. Step 4: Simplify right side
   1,055.40x = 884,584.64
5. Step 5: Solve for x
   x = 884,584.64/1,055.40
6. Step 6: Final answer
   x = 838.15